I agree, I’m a happy customer for several years as well. It’s not the cheapest service, but it’s no-nonsense and reliable.
I pointed my own domain to Fastmail and can use wildcard email addresses (like lemmy@mydomain.com) that all end in my inbox. Also my contacts are synced on the phone with Fastmail using CardDAV support, using the DAVX5 app on Android. It’s really nice to have this much flexibility.
The explanations that chiropractors have for how it works are basically pseudoscience. It is for the most part a placebo (they pretend to fix alignment issues that just don’t exist). But I’m not denying there may be instances where they actually fix something which could’ve been fixed by physical therapy as well. It’s a dangerous gamble though, there are cases where people got paralyzed or outright died because of a chiropractor. This is a good overview: https://www.skepdic.com/chiro.html